> whtt should add the userid:pass@ to each link after 
> scanning  it in case does not already contain the 
> string

This is done by default, except if some bugs remains.. 
try to activate (Options/Experts Only/Activate debug 
mode) the verbose request logging, and look at the hts-
ioinfo.txt file : this file will contains all HTTP 
requests and responses. All requests should contains 
the authentication field